Twin-cylinder single-acting vertical-plunger pump



B. F. CURTIS. TWIN CYLINDER SINGLE ACTING VERTICAL PLlINGE-II PUMP.

APPLICATION FILED SEPTISI 1920.

Patented Dec. 13, 1921.

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11T. CURTIS.

TWIN CYLINDER SINGLE ACTI-NG VERTICAL PLUNGEH PUMP. APPLICATION FILEDSEPT. 3. 1920.

Patented 1196.13, 1921-.

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BENJAMIN n. Gnarls, or recrean', onnalsiorae, .Assrenon ro CURTISPORCELAIN PUMP coiurrlnr, A conronafrron or OKLAHOMA. i

TWIN-CYLINDER SNGLE-ACTXNG VERTIGAL-PLUNGER PUMP.

Specication of Letters Patent.

resented 1300.13, `1921,.

Application lel September 3, 1920. Serial No. 407,946.

Single-Acting Vertical-Plunger Pumps, of'

which the following is a specification.

This invention relates to pumps of the type utilized for pumping fluidscontaining acids, such as water from mines, and the primary object ofthe present invention is to provide an improved twin cylinder singleacting vertical plunger pump embodying a single body of vitreousmaterial, having .i novel arrangement of valves and 'valve chambers or`ports therein, so that the posi tive operation of the pump is insured,and so that ready and easy access can be had to the ports at all times.

Other objects of the invention are to pro vide a novel type of piston orplunger so constructed, and arranged in such a manner with the pump thatthe necessity of providing a guide cross head therefor is eliminated,and to provide a novel means of lubrication for the piston or plunger.

A further object of the invention is to provide an improved means ofconnecting the cover plates for the valve chambers or ports and thestuffing boxes to the vpump body, the means utilized for connectingthevalve stem covers and the stuffing boxes to the pump body being arrangedin such a manner as to form reinforcements for the pump body and thusadd additional strength thereto.

A still further object of the invention is to provide a novel twincylinder single action vertical plunger pump, which is of exceptionallysimple and durable oonstruction, and which entirely eliminates thecomplicated parts now utilized in a pump of this character.

W ith these and other objects in view, the invention consists inthenovel construction, arrangement and formation of 'parts as will behereinafter more specifically described, claimed and illustrated in theaccompanying drawings, forming a part of tion, in which drawings:

Figure l is a central vertical longitudinal section through the improvedpump.

this specilica-y Fig. 2 is a top plan view of the improved pump, theconnecting` rods being shown in section.

Fig. 3 is a horizontal section through the improved pump illustratingthe type of` valves utilized therein.

Fig.V Li is a vertical transverse section through. the improved pumpalso` illustrating the type of valves utilized and the arrangementthereof in the pump body and in relation to the pump cylinders.

Referring to the drawings in detail, wherein similar referencecharacters desig nate corresponding parts throughout the several views,the letter A indicates the improved pump; B, the body; C the inlet orsuction valves; D, the discharge or outlet valves; and E and F thepistons.

The pump body B is formed of a single block of vitreous material, suchas porcelainor the like, and is provided with a pair of spacedhorizontally alined vertical bores 5 and 6 which form the cylinders, andwhich have reciprocably mounted therein the pistons or plungers E and F.The cylinders or bores 5 and 6 open outwardly of the upper end of thebody B and terminate short of the lower end thereof as clearly shown inFig. l of the drawings.r

A pair of spaced passages or ways 7 Uand 8 are arranged transverselythrough the pump body B intermediate the cylinders or bores 5 and 6 andthe uppermost 'passage or way 7 forms the discharge or outlet way forthe pump while the lower passage or way 8 forms the suction or inlet wayfor the pump. The lower inlet or suction pas` sageway 8 hascommunicating therewith the inlet or suction ports or chambers l0 and lland these chambers are arranged on the opposite sides of thelongitudinal center of the pump body and are so disposed, that one willact for each cylinder. The upper passageway 7 whichforms the dischargeor outlet way for the pump has communicating' therewith the ,valvedischarge or outlet chambers or ports l2 and 13 and these chambers orports also communicate with the upper ends of the valve chambers orports l0 and l1. By referringtothe drawings, it

eating therewith a downwardly and inwardly extending way 14, whichcommunicates with the lower' end of the bore or cylinder 6, while thechamber 11 has communi* eating therewith the depending and inwardlyextending way 15, which communicates with the lower end of thecylinderor bore 5. The suction or inlet valves C and the outlet ordischarge valves D are arranged in their respective chambers, and eachof the cylinders are provided with annular Vgrooves 16 for the receptionof the annular valve seats 17 which are preferably formed from rub-V beror the like to form a cushion seat for the valves. The valve bodies arepreferablyv formedV of vitreous material such as porcelain or the likeandi adapted to fit upon the upper surface of the valve seats 17 asclearly shown in Fig. 4. of the drawings. From this arrangement, it willbe seen that on the suction stroke, the suction valve will be operated,and that on the discharge stroke, the discharge 0r outlet valves will beoperated. The passage ways 7 and 8 extend entirely through the body Band cover plates 18 are provided for the opposite sides of thepassageway 8 and cover plates 19 are provided p for the opposite sidesof the passageway 7.

"lhe cover plates 18 also overlie the laterally extending passageways2() which communicate with the ivalve chambers 10 and 11. rlhe provisionof these passageways 20 form means for facilitating' the positioning ofthe inlet or suction valves in the chambers.

The cover plates 18 and 19 are held in place by transversely extendingbolts .21 which extend through suitableY openings formedr in the body Band the cover plates. These bolts act as reinforcements for the bodyland serve to strengthen the same.

The cover plate 19 on one side of the body B is provided with an elbowjoint 22, which' communicateswith theV passageway 7, and this elbowjoint supports the air chambers 23. Theopposite cover plate 19 isprovided with anopening 24 which is adapted to receive the outlet ordischarge pipe. vrEhe cover plate 18 on the same side of the body B asthe cover plate 19 which is provided with the opening 24 is providedwith an opening 25 for the inlet or suction pipe, (not shown). Thevalves C are Vnormally held upon their 'seats by means of leaf springs26, and these leaf springs 26 are attached by means of bolts or the like27 to the cover plates 18. The valves ,D are also helden their seats bymeans of springs 28, which have their outer ends secured by means ofscrewspr the like 29 t0 the cover plates 19. 1t can thus be seen thatwhen the cover plates are removedthe valves C and D will be removedtherewith. This permits of the easy repair of the valves or the valveseats.

The plungers E and F asstated are reciprocably mounted in the bores 5and 6 and each one of the plungers or pistons is constructed identicallyVthe same and each includes a relatively long cylindrical vitreous body30 which Vhas the longitudinally extending bore 31 arranged therein. TheupperV ends of the bores 31 are enlarged as at 32 andthe enlargedportion 32 of the bore forms a reservoir for the lubricating oil 33. ipiston rodk34 is fitted within each bore 31 and has an annular shoulder35 formed thereon, which engages the shoulder formed by the enlargedportion 33 of the bore 81. A nut or the like 86 is threaded on the lowerend of the piston rod and holds the same firmly connected with thepiston or plunger. A wrist pin 3'? is utilized for connecting eachpiston rod with eachyconnecting rod 38. By forming the pistons orplungers relatively long, the necessity of lproviding a guide cross headfor the same is` eliminated and the connectingl rods can be secureddirectly to the crank shaft or the like if so desired. Relatively fineopenings 39 are formed in the pump plunger or piston body 30 at thelower end of the enlarged portion 32 of the bores and these fineopenings permit the lubricating oil 33 to flow therethrough so as t0lubricate the sides of the pistons and the walls of the cylinder bores 5and 6. Suitable packing glands 40 are provided and these packing glandsare adapted to engage the packings 41 fitted in enlarged portions of thebores 5 and 6. The lower portions of the glands 40 are tapered as at 42so as to insure that the packing will be forced into engagement with theouter sides of the plunger piston bodies 30. 1f so desired these glandsmay be lined with Babbitt metal or the like. The glands are providedwith laterally extending aperturedears 44 through which arey adapted toextend the retainer bolts 45. These bolts 45 may extend entirely throughthe body B which may be provided with bores 46l for the reception of thesamej 1f so desired, the heads of the bolts may be countersunkZ inthelower surface of the block B as at 4 By this arrangement, it can beVseein that a twin cylinder single acting vertical plunger piston pumphas been provided of exceptionally simple and compact construction, inwhich the operating parts thereof can be readily replaced when desiredor necessary.

1f so desired, the connector may be used in two, four, six or eightunits, by arranging them in series according tothe requirements. l

Changes in details may be made without departing from the spirit oryscope of this invention; but,

l claim: y Y .LA pump comprising a body formed from a single piece ofvitreous materiahcvlinders formed in said body in longitudinal, verticalaline-ment, transversely extending discharge and inlet ways arrangedthrough the body intermediate the cylinders, discharge and inlet valvechambers formed in the body and communica-ting with said dischare'e andinlet ways and with the lower ends ot the cylinders, cover plates forsaid discharge and inlet ways, transversely extending bolts connectingthe covers to said bodies, said bolts forming reinforcements for thebodies, and pistons reciprocably mounted in said cylinders. a

2. i pump comprising a body formed of a single block of material havinga pair of vertically disposed longitudinally alined bores formedtherein, the bores terminating short oil the lower end of the block andforming cylinders, relatively long pistons reciproca-bly mounted in saidcylinders, transversely extending vertically alined discharge and inletways formed in the block intermediate the cylinders, discharge and inletvalve chambersA formed in the ways :for each cylinder, said valvechambers commu nicating with each. other, downwardly and inwardlyextending ways communicating with the valve chambers and with the lowerend of each cylinder, cover plates for said ways, an air chamber carriedby one of said covers for the discharge way, and discharge and inletvalves carried by lsaid cover plates arranged in said valve chambers.

il. A pump comprising a body, a pair of cylinders formed in the body,reciprocating pistons in said cylinders, transversely ei:- tending inletand discharge ways formed in the body intermediate the cylinders,discharge and inlet. chambers formed in said vways, laterally extendingways connecting the valve chambers with the. lower ends olf thecylinders, discharge and inlet valves ar ranged in said valveV chambers,cover plates for the ways arranged on opposite sides of the bodies,transversely extending bolts arranged through the body fork connectingthe plates thereto, packing glands'for the pistons, and verticallydisposed. bolts extending through the body and the glands, saidvertically disposed and transvesely disposed bolts formingreinforcements for said body.

e. A pump comprising a body formed from a single bloeit of vitreousmaterial lia-v2 ing inwardly extending spaced cylindrical bores formedtherein in longitudinal alinement, the cylindrical bores terminatingshort of the lower end of the block, a pair of centrally disposedsuperposed transversely extending ways formed in the body intermediatethe cylindrical bores, one of said ways being disposed adjacent to theupper ends of the cylindrical bores and constituting the dischargeoutlet, the other way being arranged adjacent to the lower ends of thebores and constituting the inlet, relatively long vitreous pistonsreciprocably mounted in the cylindrical bores, discharge and inletchambers comnfiunicating` with each other and with the upper and lowerways, discharge and inlet valves anged in said chambers, and inwardlyextending ways communicating with thev transversely extending ways andwith the chambers.

BENJAMIN F. CURTIS.

